Preparation method of silane-modified polyether sealant

A technology of silane-modified polyether and sealant, applied in the field of sealant, can solve the problems of long-term storage of unfavorable products, deactivation of raw materials, limitation of raw materials, etc., so as to shorten the total heating and total cooling time, reduce the heating and cooling time, and reduce the The effect of production energy consumption

Active Publication Date: 2019-01-22
GUANGDONG LIANCHENG RESIDENTIAL EQUIP INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high-temperature dehydration reaction is likely to cause the deactivation of some raw materials, and there are great restrictions on the selection of raw materials. Moreover, even if high-temperature dehydration is used, the shelf life of the sealant prepared by the existing process is still relatively short.
However, the shelf life is short, and the product is easy to deteriorate, which is not conducive to long-term storage of the product. The production and sales cycle of industrial products is generally longer. Therefore, it is necessary to prepare a sealant product with a long shelf life to meet market needs.

Method used

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  • Preparation method of silane-modified polyether sealant
  • Preparation method of silane-modified polyether sealant
  • Preparation method of silane-modified polyether sealant

Examples

Experimental program
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Embodiment 1

[0038] This embodiment provides a preparation method of silane-modified polyether sealant, comprising the following steps:

[0039] Step 1), drying titanium dioxide, nano-calcium carbonate, polyamide wax and 3A molecular sieve respectively, the process conditions include: drying temperature 50°C, drying time 48h;

[0040] Step 2), mixing 15 parts of titanium dioxide, 210 parts of nano-calcium carbonate, 3 parts of polyamide wax and 10 parts of 3A molecular sieve after step 1), and then adding 100 parts of trimethoxysilane modified polyether, 80 parts 1 part of diisononyl phthalate, 1 part of UV absorber is Tinuvin 326, 1 part of light stabilizer is Tinuvin 770, 1 part of antioxidant is Irganox 245, mix evenly, vacuum dehydrate, process conditions include: mixing temperature 50 ℃, vacuum dehydration for 0.5h, vacuum degree is -0.1MPa;

[0041] Step 3), release the vacuum, add 20 parts of neutral alumina (accounting for 4.6% of the total mass of each raw material) to obtain a m...

Embodiment 2

[0044] This embodiment provides a preparation method of silane-modified polyether sealant, comprising the following steps:

[0045]Step 1), drying titanium dioxide, nano-calcium carbonate, polyamide wax and 3A molecular sieve respectively, the process conditions include: drying temperature 55°C, drying time 40h;

[0046] Step 2), mixing 15 parts of carbon black, 210 parts of nano-calcium carbonate, 3 parts of fumed silica and 10 parts of 3A molecular sieve after step 1), and then adding 100 parts of trimethoxysilane modified polyether in sequence , 80 parts of diisononyl phthalate, 1 part of UV absorber is Tinuvin 329, 1 part of light stabilizer is Tinuvin 770, 1 part of antioxidant is Irganox 1010, mix well, vacuum dehydrate, process conditions include: mixing The temperature is 55°C, the vacuum dehydration is 0.6h, and the vacuum degree is -0.09MPa;

[0047] Step 3), release the vacuum, add 25 parts of neutral alumina (accounting for 5.8% of the total mass of each raw mater...

Embodiment 3

[0050] This embodiment provides a preparation method of silane-modified polyether sealant, comprising the following steps:

[0051] Step 1), drying titanium dioxide, nano-calcium carbonate, polyamide wax and 3A molecular sieve respectively, the process conditions include: drying temperature 60°C, drying time 48h;

[0052] Step 2), mixing 15 parts of titanium dioxide, 210 parts of nano-calcium carbonate, 3 parts of polyamide wax and 10 parts of 3A molecular sieve after step 1), and then adding 100 parts of trimethoxysilane modified polyether, 80 parts 1 part of diisononyl phthalate, 1 part of UV absorber is Tinuvin 326, 1 part of light stabilizer is Tinuvin 770, 1 part of antioxidant is Irganox 245, mix well, vacuum dehydrate, process conditions include: mixing temperature 60 ℃, vacuum dehydration for 0.3h, vacuum degree is -0.1MPa;

[0053] Step 3), release the vacuum, add 15 parts of neutral alumina (accounting for 3.4% of the total mass of each raw material) to obtain a mix...

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Abstract

The invention relates to a preparation method of a silane-modified polyether sealant, comprising the following steps: drying a filler, a thixotropic agent and a 3A molecular sieve respectively while the process conditions include: drying temperature 50-60 DEG C and drying time 40-60h; mixing the filler, the thixotropic agent and the 3A molecular sieve, and then adding silane-modified polyether resin, a plasticizer, a ultraviolet absorber, a light stabilizer and an antioxidant in sequence, uniformly mixing at a temperature of 50-60 DEG C, carrying out vacuum dehydration for 0.3-0.8 h and at thevacuum degree of 0.08-0.2 MPa; removing the vacuum, adding neutral alumina to obtain a mixed system, heating the mixed system to 70-75 DEG C, continuing vacuum stirring for 1-2h and at the vacuum degree of -0.08 to -0.2 MPa until the water content of the mixed system is reduced to 0.4%-1%; cooling the mixed system treated in the Step 3) to below 50 DEG C, adding a catalyst, a moisture scavenger and an adhesion promoter, uniformly mixing, and carrying out vacuum defoamation. The above preparation method can help prolong the shelf life of the silane-modified polyether sealant.

Description

technical field [0001] The invention relates to the field of sealant, in particular to a preparation method of silane-modified polyether sealant. Background technique [0002] Silane-modified polyether sealant is a high-performance environmental-friendly sealant based on alkoxysilane-terminated polyether resin. Due to its main chain polyether structural unit and terminal silane structure, silane-modified polyether sealant combines the advantages of silicone sealant and polyurethane sealant, showing excellent weather resistance, high resistance to deformation and displacement, and good Adhesive, finishing, environmental friendliness and ease of operation, etc., so it is widely used in construction, industry, rail transit, interior decoration and other fields. [0003] However, since the curing mechanism of silane-modified polyether sealant is the same as that of silicone glue, both of which are moisture-cured, when the existing process is used to prepare silane-modified poly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J171/00C09J11/04C09J11/06C09J11/08
CPCC08K2003/2227C09J11/04C09J11/06C09J11/08C09J171/00C08L77/00C08K13/04C08K7/24C08K3/22
Inventor 张培其他发明人请求不公开姓名
Owner GUANGDONG LIANCHENG RESIDENTIAL EQUIP INFORMATION TECH CO LTD
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